The line comes from Star Wars: Episode III – Revenge of the Sith (2005), where Ewan McGregor's Obi-Wan Kenobi greets General Grievous with a calm 'Hello there' before their duel. It became one of the most quoted prequel lines, fuelled by the prequel meme community and reaction-image culture in the late 2010s. Editors now treat it as a universal polite-yet-smug greeting, dropping it over entrances, reveals and fake-out introductions. Its staying power comes from that perfect mix of courtesy and confidence.